LG RH4820W Service Manual page 68

Hdd/dvd recorder
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LD CHECK
(Laser operating is abnormal)
Execute "B.Check ALPC Parameters"
of "How to use Test Tool"
Is ALPC parameters
valid?
Execute "D.Laser Inspection"
of "How to use Test Tool"
OFF level
VRDC level &FPD
VWDC1 level &FPD
VWDC2 level &FPD
OK
FPD
VRDC
3-88
Execute "C.Laser Power Setup"of
"How to use Test Tool"
Check reference voltage.
E
F
G
VWDC2
VWDC1

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